The final paragraph
For now, Intel's On Demand program is reserved for servers, and we would expect it to remain a prerogative of Xeon platforms. Meanwhile, back in the day, Intel offered software upgrades for its desktop processors to make them run faster. Unfortunately, that program faced criticism as Intel essentially crippled its perfectly fine processors. As a result, some might think the On Demand program mimics the ill-fated Intel Upgrade Service. Still, keeping in mind that the server world behaves differently than the client PC world and that we do not know the terms of Intel's On Demand, we would not draw parallels here until we know all the details.
I would hope so too but it isn't that easy. Yes those cpu's are constantly vulnerable to side channel attacks and all that good spectre/meltdown shit. But if you look into the projects to actually overcome the management engine like libreboot and coreboot, shit is lagging behind by a WIDE margin. Cracking open cpu's is really really hard